Vergence analysis reveals the influence of axial distances on accommodation with age and axial ametropia

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
Leon N DaviesJames S Wolffsohn

Abstract

Despite numerous investigations, the aetiology and mechanism of accommodation and presbyopia remains equivocal. Using Gaussian first-order ray tracing calculations, we examine the contribution that ocular axial distances make to the accommodation response. Further, the influence of age and ametropia are also considered. The data show that all changes in axial distances during accommodation reduce the accommodation response, with the reduction in anterior chamber depth contributing most to this overall attenuation. Although the total power loss due to the changes in axial distances remained constant with increasing age, hyperopes exhibited less accommodation than myopes. The study, therefore, enhances our understanding of biometric accommodative changes and demonstrates the utility of vergence analysis in the assessment of accommodation.

References

Jul 1, 1984·American Journal of Optometry and Physiological Optics·P Erickson
Nov 1, 1981·American Journal of Optometry and Physiological Optics·G A Leary
Jul 11, 2001·Optometry and Vision Science : Official Publication of the American Academy of Optometry·M DubbelmanH A Weeber
Mar 27, 2002·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Brad A MoffatJames M Pope
Aug 23, 2002·Acta Ophthalmologica Scandinavica·Michiel DubbelmanHennie J Völker-Dieben
Jan 28, 2004·Investigative Ophthalmology & Visual Science·Susan A StrenkJ Kevin DeMarco
Mar 10, 2004·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Thomas KirschkampJean-Cyriaque Barry
Dec 2, 2004·Vision Research·M DubbelmanH A Weeber
Feb 17, 2005·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Sverker Norrby
Apr 15, 2005·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Nicola S LoganBernard Gilmartin
Mar 7, 2006·Journal of Cataract and Refractive Surgery·Arthur HoJean-Marie Parel
Sep 19, 2006·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Olivia A HuntCarlos García-Resúa
Nov 30, 2006·Journal of Vision·Patricia RosalesRob van der Heijde
May 26, 2007·Investigative Ophthalmology & Visual Science·Donald O MuttiUNKNOWN CLEERE Study Group
Aug 28, 2007·Journal of Cataract and Refractive Surgery·Alexis TsorbatzoglouAndrás Berta
Dec 1, 2007·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Catherine E JonesJames M Pope
Mar 14, 2008·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·W Neil Charman
May 20, 2008·Journal of Vision·David A AtchisonPeter G Swann
Oct 18, 2008·The British Journal of Ophthalmology·S WarrierR J Casson

❮ Previous
Next ❯

Citations

Oct 4, 2015·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Deborah S LaughtonLeon N Davies
Apr 3, 2012·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Alison AldersonAmy L Sheppard
Apr 29, 2021·Investigative Ophthalmology & Visual Science·Nicola S LoganJames S Wolffsohn

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
Fiona J Baker, B Gilmartin
Optometry and Vision Science : Official Publication of the American Academy of Optometry
K M Chung
Optometry and Vision Science : Official Publication of the American Academy of Optometry
Matthew P Cufflin, Edward A H Mallen
Optometry and Vision Science : Official Publication of the American Academy of Optometry
M T Pardue, J G Sivak
Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
H Obstfeld
© 2021 Meta ULC. All rights reserved